The exact wording to Atco's is "....an alternative ATCO position will be offered to you with the company. Furthermore, if the offer of alternative employment is not available at that time, Serco will continue your employment on your current salary until such time as the offer materializes." Seems fair enough to me.
The company line is that the DCA have still not informed Serco of their decision so Serco are initializing the pull out.
Considering we leave in 3 months, it's strange that Thales haven't been seen about the place, yet. They better move quick if they're hoping to entice controllers to stay.